Composition for code reuse : Inheritance Composition « Class « Java

1. Java
2. Class
3. Inheritance Composition

Composition for code reuse

// : c06:SprinklerSystem.java
// Composition for code reuse.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.

class WaterSource {
  private String s;

  WaterSource() {
    System.out.println("WaterSource()");
    s = new String("Constructed");
  }

  public String toString() {
    return s;
  }
}

public class SprinklerSystem {
  private String valve1, valve2, valve3, valve4;

  private WaterSource source;

  private int i;

  private float f;

  public String toString() {
    return "valve1 = " + valve1 + "\n" + "valve2 = " + valve2 + "\n"
        + "valve3 = " + valve3 + "\n" + "valve4 = " + valve4 + "\n"
        + "i = " + i + "\n" + "f = " + f + "\n" + "source = " + source;
  }

  public static void main(String[] args) {
    SprinklerSystem sprinklers = new SprinklerSystem();
    System.out.println(sprinklers);

  }
} ///:~



           
       

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2.	Inheritance, constructors and arguments
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4.	Cleanup and inheritance
5.	Proper inheritance of an inner class
6.	Extending an interface with inheritance
7.	Inheriting an inner class